NC0021491_Permit Issuance_20100410

h
Beverly Eaves Perdue
Governor
`A
NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Coleen H. Sullins
Director
Mrs. Christine W. Bralley,
Town of Mocksville
171 Clement Street
Mocksville, North Carolina
Dear Mrs. Bralley:
Town Manager
27028
April 10, 2010
Subject: NPDES Permit Issuance
Permit No. NCO021491
Dutchman Creek WWI?
Davie County
Dee Freeman
Secretary
In accordance with the application for discharge permit received, the Division is forwarding herewith the
subject NPDES permit. This permit is issued pursuant to the requirements of North Carolina General Statute
143-215.1 and the Memorandum of Agreement between North Carolina and the U.S. Environmental
Protection Agency dated October 15, 2007 (or as subsequently amended).
The final permit authorizes the Town of Mocksville to discharge wastewater from the Dutchman Creek
Wastewater Treatment Plant to Dutchman Creek, a class C water in the Yadkin -Pee Dee River Basin. The
permit includes discharge limitations/or monitoring for flow, BOD5, ammonia nitrogen, total suspended
solids, dissolved oxygen, total residual chlorine, fecal coliform, cadmium, cyanide, silver, copper, zinc, and
chronic toxicity.
The following procedure has been implemented by DWQ: Total residual chlorine (TRC) compliance level
changed to 50 ug/L. Effective March 1, 2008, the Division received EPA approval to allow a 50 ug/1 TRC
compliance level. This change is due to analytical difficulties with TRC measurements. Facilities will still be
required to report actual results on their monthly discharge monitoring report (DMR) submittals, but for
compliance purposes, all TRC values below 50 ug/L will be treated as zero. A footnote regarding this change
has been added to the effluent limitations page in the permit.
Please note that it has been determined that the Mocksville-Dutchman Creek WW`IP is now classified
as a Grade 3 biological water pollution control treatment system. Based on this change of grade and North
Carolina regulation 15A NCAC .0508 regarding tests and measurements applicable to SICs (Standard
Industrial Classification), the monitoring frequency for the following parameters will be increased to
three (3) times per week: BOD5, total suspended solids, dissolved oxygen, NH3-N, total residual
chlorine and pH. The increased monitoring frequency will be effective September 1, 2010 and is
designated in effluent page A.(2).
1617 Mail Service Center, Raleigh, North Carolina 27699-1617
Location: 512 N. Salisbury St. Raleigh, North Carolina 27604 One
Phone: [phone] FAX: [phone] Customer Service:1-877-623-6748 NorthCarolina
Internet: ww�v.ncwaterquafity.arg � Naturall
An Equal opportunity 1 Affirmative Action Employer - y

In addition, the following monitoring change will be implemented if Mocksville terminates its
agreement with the Yadkin Pee -Dee River Basin Association.
• Instream monitoring for temperature and dissolved oxygen will be three times per week.
There will be an additional modification which will reduce effluent monitoring for total nitrogen
(TN) and total phosphorus (TP) from weekly to quarterly. This modification for TN and TP will be
effective on May 1, 2010.
Also, the description of some treatment components of the Mocksville - Dutchman Creek WVTP
has been revised on the supplement to permit cover sheet.
The following modifications in the February 17th draft permit remain in the final permit:
• The deletion of the effluent page for 0.68 MGD based on the completion of the plant expansion to 0.98
MGD. The wasteflow for the plant will be 0.98 MGD instead of 0.981 MGD, based on information in
the permit application.
• A monthly average and a daily maximum limit for cadmium will be added to the permit based on the
results of the reasonable potential analysis that indicated the potential to exceed the water quality
standard instream. The monthly average limit will be 7 ug/1 and the daily maximum limit will be 15
ug/l.
• Additional treatment components have been added on the supplement to permit cover sheet. Please
review the permit cover sheet to confirm these additions.
• There have been minor language changes and the addition of a new paragraph regarding data
submittal in special condition A. (2) Chronic Toxicity Permit Limits. (The new paragraph is located
second from the end of the condition.)
• An annual effluent pollutant scan has been added to fulfill EPA's application requirement for major
municipal wastewater treatment facilities.
• Monthly monitoring for total chromium, total nickel, and total lead has been deleted from the permit
based on the results of a reasonable potential analysis conducted on submitted monitoring data. The
results indicated that there was no reasonable potential to exceed water quality standards in the
receiving stream: , ,
• The effluent limit for total cyanide has been removed from the permit based on the results of a
reasonable potential analysis conducted on submitted monitoring data. The results indicated that
there was no reasonable potential to exceed water quality standards instream. It is recommended that
total cyanide be monitored quarterly in conjunction with the whole effluent toxicity test.
If any parts, measurement frequencies or sampling requirements contained in this permit are
unacceptable to you, you have the right to an adjudicatory hearing upon written request within thirty (30)
days following receipt of this letter. This request must be in the form of a written petition, conforming to
Chapter 150B of the North Carolina General Statutes, and filed with the office of Administrative Hearings,
6714 Mail Service Center, Raleigh, North Carolina 27699-6714. Unless such a demand is made, this permit
shall be final and binding.

Please take notice that this permit is not transferable. The Division may require modification revocation
and reissuance of the permit. This permit does not affect the legal requirements to obtain other permits
which may be required by the Division of Water Quality or permits required by the Division of Land
Resources, Coastal Area Management Act, or any other Federal or Local governmental permits may be
required.
If you have any questions or need additional information, please contact Jacquelyn Nowell at telephone
number [phone].
Sin erely, (/
1 lu'l
C een H. Sullins
Attachments
cc: Winston Salem Regional Office/Surface Water Protection Section
EPA Region IV/Attu. Marshall Hyatt
Aquatic Toxicology Unit/Cindy Moore (ecopy)
Technical Assistance and Certification Unit (ecopy)
ESS/Carrie Ruhlman (ecopy)
NPDES File/NC0021491
Central Files
1617 Mail Service Center, Raleigh, North Carolina 27699-1617
Location: 512 N. Salisbury St. Raleigh, North Carolina 27604
Phone: [phone] \ FAX: [phone] \ Customer Service: 1-877-623-6748
Internet: www.ncwaterquality.org
An Equal Opponunit 1 Affirmative Acton Employer
Nne
orthCarolina
Naturally

Perrgit NCO021491
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provisions of North Carolina General Statute 143-215.1, other lawful
standards and regulations promulgated and adopted by the North Carolina Environmental
Management Commission, and the Federal Water Pollution Control Act, as amended, the
Town of Mocksville
is hereby authorized to discharge wastewater from a facility located at the
Dutchman Creek WWTP
295 Garwood Road
Mocksville
Davie County
to receiving waters designated as Dutchman Creek in the Yadkin -Pee Dee River Basin
in accordance with effluent limitations, monitoring requirements, and other conditions
set forth in Parts I, II, III, and IV hereof.
The permit shall become effective May 1, 2010.
This permit and the authorization to discharge shall expire at midnight on June 30, 2014.
Signed this day April 10, 2010.
I
Teen H. Sullins, Director
/ Division of Water Quality
By Authority of the Environmental Management Commission

Permit NQ0021491
SUPPLEMENT TO PERMIT COVER SHEET
All previous NPDES Permits issued to this facility, whether for operation or discharge are hereby revoked. As of this
permit issuance, any previously issued permit bearing this number is no longer effective. Therefore, the exclusive
authority to operate and discharge from this facility arises under the permit conditions, requirements, terms, and
provisions included herein.
The Town of Mocksville is hereby authorized to:
1. Continue to operate the existing 0.98 MGD wastewater treatment system that
includes the following components:
➢ Influent pump station with mechanical fine screening
➢ Flow splitter box
➢ Grit removal chambers with manual bar screens
➢ Flow measurement
➢ Three aeration basins
➢ Three secondary clarifiers
➢ Chlorination and dechlorination units
➢ Sludge recirculation and wasting
➢ Aerobic digester and solids storage
This facility is located at the Dutchman Creek WWTP (295 Garwood Road,
Mocksville) in Davie County.
2. Discharge from said treatment works at the location specified on the attached map
into Dutchman Creek, classified C waters in the Yadkin -Pee Dee River Basin.

Town of Mocksville - NCO021491
USGS Quad Number: D 16 NE I I Lat.:35°53'33"
Receiving Stream: Dutchman's Creek Long.: 80030'07"
Stream Class: C
Subbasin: Yadkin 03-07-05
0
91 Outfall001 H
Facility
Location
North I I Scale 1:24,000

Permit NCO021491
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (0.98 MGD)
During the period beginning on the effective date of the permit and lasting until August 30, 2010, the
Permittee is authorized to discharge from outfall 001. Such discharges shall be limited and monitored by
the Permittee as snecified below:
EFFLUENT
LIMITS
MONITORING REQUIREMENTS
CHARACTERISTICS
Monthly
Weekly
Daily
Measurement
Sample
Sample
Averse
Averse
Maximum
Freuen
T e
Location'
Flow
0.98 MGD
Continuous
Recording
I or E
BOD5 20 °C2
5.0 mg/1
7.5 mg/1
Weekly
Composite
I, E
(April 1—October 30)
BOD5 20 0C2
10.0 mg/L
15.0 mg/L
Weekly
Composite
I, E
(November 1— March 31)
Total Suspended Solids2
30.0 mg/l
45.0 mg/l
Weekly
Composite
I, E
Temperature
Daily
Grab
E, U, D
Dissolved Oxygen 3
Weekly
Grab
E, U, D
Fecal Coliform
200 / 100 ml
400 / 100 ml
Weekly
Grab
E
(geometric mean)
NH3 as N
2.0 mg/l
6.0 mg/l
Weekly
Composite
E
(April 1- October 30)
NH3 as N (winter)
4.0 mg/L
12.0 mg/L
Weekly
Composite
E
(November 1— March 31)
Total Nitrogen
Quarterly
Composite
E
(NO2 + NO3 + TKN)
Total Phosphorus
Quarterly
Composite
E
Total Residual Chlorine
28µg/l
2/Week
Grab
E
Chronic Toxici s
Quarterly
Composite
E
Cadmium
7 u /l
15 u /l
Monthly
Composite
E
Copper
Monthly
Composite
E
Zinc
Monthly
Composite
E
Cyanide
Quarterly
Grab
E
Silver
Monthty
Composite
E
Effluent Pollutant Scan6
Annually
Variable
E
H
6.0 — 9.0 standard units
Weekly
Grab
E
Notes:
1. I= Influent. E= Effluent. U= Upstream approximately 100 feet upstream from the outfall. D= Downstream
approximately 0.5 miles downstream from the outfall. Upstream and downstream samples shall be grab
samples collected 3/week during June, July, August, and September and once per week during the rest of
the year. As a participant in the Yadkin Pee -Dee River Basin Association, the subject facility is not
responsible for conducting the instream monitoring requirements as stated above. Should your
membership in the agreement be terminated, you shall notify the Division immediately and the instream
monitoring requirements specified in your permit will be automatically reinstated.
2. The monthly average effluent BOD5 and Total Suspended Solids concentrations shall not exceed 15 percent
of the respective influent value (85% removal).
3. The daily average dissolved oxygen effluent concentration shall not be less than 6.0 mg/1 from April 1 to
October 31, and no less than 5.0 mg/L from November 1 to March 31.
4. The Division shall consider all effluent total residual chlorine values reported below 50 µg/1 to be in
compliance with the permit. However, the Permittee shall continue to record and submit all values reported
by a North Carolina certified laboratory (including field certified), even if these values fall below 50 µg/l.
5. Chronic Toxicity (Ceriodaphnia) at 371/o: January, April, July, and October (see condition A. (1)).
6. See Condition A. (4).
There shall be no discharge of floating solids or visible foam in other than trace amounts.

Permit NCO021491
A. (2.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (0.98 MGD)
During the period beginning on the September 1, 2010 and lasting until permit expiration, the Permittee is
authorized to discharge from outfall 001. Such discharges shall be limited and monitored by the
Permittee as specified below:
EFFLUENT
LIMITS
MONITORING REQUIREMENTS
CHARACTERISTICS
Monthly
Weekly
Daily
Measurement
Sample
Sample
Average
Avera a
Maximum
Frequency
Type
Location'
Flow
0.98 MGD
Continuous
Recording
I or E
BOD5 20 °C2
5.0 mg/1
7.5 mg/l
3/Week
Composite
I, E
(April 1— October 30)
BOD5 20 °C2
10.0 mg/L
15.0 mg/L
3/Week
Composite
I, E
(November 1— March 31)
Total Suspended Solids2
30.0 mg/l
45.0 mg/l
3/Week
Composite
I, E
Temperature
Daily
Grab
E, U, D
Dissolved Oxygen 3
3/Week
Grab
E, U, D
Fecal Coliform
200 / 100 ml
400 / 100 ml
3/Week
Grab
E
(geometric mean)
NH3 as N
2.0 mg/1
6.0 mg/1
3/Week
Composite
E
(April 1- October 30)
NH3 as N (winter)
4.0 mg/L
12.0 mg/L
3/Week
Composite
E
(November 1— March 31)
Total Nitrogen
Quarterly
Composite
E
(NO2 + NO3 + TKN)
Total Phosphorus
Quarterly
Composite
E
Total Residual Chlorine4
281tg/l
3/Week
Grab
E
Chronic Toxicity'
Quarterly
Composite
E
Cadmium
7 u /1
15 u /l
Monthly
Composite
E
Copper
Monthly
Composite
E
Zinc
Monthly
Composite
E
Cyanide
Quarterly
Grab
E
Silver
Monthly
" Composite
E
Effluent Pollutant Scan
Annually
Variable
E
H
6.0 — 9.0 standard units
3/Week
Grab
E
Notes:
1. I= Influent. E= Effluent. U= Upstream approximately 100 feet upstream from the outfall. D= Downstream
approximately 0.5 miles downstream from the outfall. Upstream and downstream samples shall be grab
samples collected 3/week during June, July, August, and September and once per week during the rest of
the year. As a participant in the Yadkin Pee -Dee River Basin Association, the subject facility is not
responsible for conducting the instream monitoring requirements as stated above. Should your
membership in the agreement be terminated, you shall notify the Division immediately and the instream
monitoring requirements specified in your permit will be automatically reinstated.
2. The monthly average effluent BOD5 and Total Suspended Solids concentrations shall not exceed 15 percent
of the respective influent value (85% removal).
3. The daily average dissolved oxygen effluent concentration shall not be less than 6.0 mg/1 from April 1 to
October 31, and no less than 5.0 mg/L from November 1 to March 31.
4. The Division shall consider all effluent total residual chlorine values reported below 50 µg/l to be in
compliance with the permit. However, the Permittee shall continue to record and submit all values reported
by a North Carolina certified laboratory (including field certified), even if these values fall below 50 icg/l.
5. Chronic Toxicity (Ceriodaphnia) at 370/o: January, April, July, and October (see condition A. (2.)).
6. See Condition A. (4).
There shall be no discharge of floating solids or visible foam in other than trace amounts.

Permit NCO021491
A. (3.) QUARTERLY CHRONIC TOXICITY PERMIT LIMIT (0.98 MGD)
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to
Ceriodaphnia dubia at an effluent concentration of 37%.
The permit holder shall perform at a minimum, quarterly monitoring using test procedures outlined in the
"North Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure," Revised February 1998, or subsequent
versions or "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised -February 1998)
or subsequent versions. The tests will be performed during the months of January, April, July, and October.
Effluent sampling for this testing shall be performed at the NPDES permitted final effluent discharge below all
treatment processes.
If the test procedure performed as the first test of any single quarter results in a failure or ChV below the
permit limit, then multiple -concentration testing shall be performed at a minimum, in each of the two
following months as described in "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure"
(Revised -February 1998) or subsequent versions.
The chronic value for multiple concentration tests will be determined using the geometric mean of the highest
concentration having no detectable impairment of reproduction or survival and the lowest concentration that
does have a detectable impairment of reproduction or survival. The definition of "detectable impairment,"
collection methods, exposure regimes, and further statistical methods are specified in the "North Carolina
Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised -February 1998) or subsequent versions.
All toxicity testing results required as part of this permit condition will be entered on the Effluent Discharge
Monitoring Form (MR-1) for the months in which tests were performed. If reporting pass/fail results using the
parameter code TGP3B, DWQ Form AT-1 (original) is sent to the below address. If reporting Chronic Value
results using the parameter code THP3B, DWQ Form AT-3 (original) is to be sent to the following address:
Attention: NC DENR / DWQ / Environmental Sciences Section
1621 Mail Service Center
Raleigh, North Carolina 27699-1621
Completed Aquatic Toxicity Test Forms shall be filed with the Environmental Sciences Section no later than 30
days after the end of the reporting period for which the report is made.
Test data shall be complete, accurate, include all supporting chemical/physical measurements and all
concentration/response data, and be certified by laboratory supervisor and ORC or approved designate
signature. Total residual chlorine of the effluent toxicity sample must be measured and reported if chlorine is
employed for disinfection of the waste stream.
Should there be no discharge of flow from the facility during a month in which toxicity monitoring is required,
the permittee will complete the information located at the top of the aquatic toxicity (AT) test form indicating
the facility name, permit number, pipe number, county, and the month/year of the report with the notation of
"No Flow" in the comment area of the form. The report shall be submitted to the Environmental Sciences
Section at the address cited above.
Should the permittee fail to monitor during a month in which toxicity monitoring is required, monitoring will
be required during the following month.
Should any test data from this monitoring requirement or tests performed by the North Carolina Division of
Water Quality indicate potential impacts to the receiving stream, this permit may be re -opened and modified
to include alternate monitoring requirements or limits.
If the Permittee monitors any pollutant more frequently than required by this permit, the results of such
monitoring shall be included in the calculation & reporting of the data submitted on the DMR & all AT Forms
submitted.
NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control
organism survival, minimum control organism reproduction, and appropriate environmental controls, shall
constitute an invalid test and will require immediate follow-up testing to be completed no later than the last
day of the month following the month of the initial monitoring.

Permit NCO021491
A. (4) EFFLUENT ]POLLUTANT SCAN
The Permittee shall perform an annual Effluent Pollutant Scan for all parameters listed in the attached table
(using a sufficiently sensitive detection level in accordance with 40 CFR Part 136). Samples shall represent
seasonal variations. Unless otherwise indicated, metals shall be analyzed as "total recoverable."
Ammonia (as N)
Trans-1,2-dichloroethylene
Bis (2-chloroethyl) ether
Chlorine (total residual, TRC)
1,1-dichloroethylene
Bis (2-chloroisopropyl) ether
Dissolved oxygen
1,2-dichloropropane
Bis (2-ethylhexyl) phthalate
Nitrate/Nitrite
1,3-dichloropropylene
4-bromophenyl phenyl ether
Kjeldahl nitrogen
Ethylbenzene
Butyl benzyl phthalate
Oil and grease
Methyl bromide
2-chloronaphthalenc
Phosphorus
Mcthyl chloride
4-chlorophenyl phenyl ether
Total dissolved solids
Methylene chloride
Chrysene
Hardness
1,1,2,2-tetrachloroethane
Di-n-butyl phthalate
Antimony
Tetrachloroethylenc
Di-n-octyl phthalate
Arsenic
Toluene
Dibenzo(a,h)anthracene
Beryllium
1,1,1-trichloroethane
1,2-dichlorobenzene
Cadmium
1,1,2-trichloroethane
1,3-dichlorobenzene
Chromium
Trichloroethylene
1,4-dichlorobenzene
Copper
Vinyl chloride
3,3-dichlorobenzidine
Lead
Acid -extractable compounds:
Diethyl phthalate
Mercury
P-chloro-m-cresol
Dimethyl phthalate
Nickel
2-chlorophenol
2,4-dinitrotoluene
Selenium
2,4-dichlorophenol
2,6-dinitrotoluene
Silver
2,4-dimethylphenol
1,2-diphenylhydrazine
Thallium
4,6-dinitro-o-cresol
Fluoranthcne
"Zinc
2,4-dinitrophenol
17uorene
Cyanide
2-nitrophenol
I-lexachlorobcnzene
Total phenolic compounds
4-nitrophenol
Hexachlorobutadiene
Voluble aWa& m ounds.
Pcntachlorophenol
Hexachlorocyclo-pentadiene
Acrolein
Phenol
i-lexachloroethanc
Acrylonitrile
9 4,6-trichlorophenol
Indeno(1,)3-cd)pyrcne
Benzene
Buse-nmftd c»mmounrlr.
Isophorone
Bromoform
Accnaphthene
Naphthalene
Carbon tetrachloride
Acenaphthylene
Nitrobenzene
Chlorobenzene
Anthmcene
N-nitrosodi-n-propylamine
Chlorodibromomethane
Benzidine
N-nitrosodimethylaminc
Chloroethane
Benzo(a)anthmcene
N-nitrosodiphenylamine
2-chloroethylvinyl ether
Bcnzo(a)pyrene
Phenanthrenc
Chloroform
3,4 benzofluoranthene
Pyrene
Dichlorobromomethane
Benzo(glu)perylene
1,2,4-trichlorobenzenc
1,1-dichloroethane
Benzo(k) fluoranthene
1,2-dichloroethane
Bis (2-chloroethoxy) methane
Test results shall be reported to the Division in DWQ Form- A MR-PPA1 or in a form approved by
the Director within 90 days of sampling. The report shall be submitted to the following address:
Division of Water Quality, Surface Water Protection Section, Central Files,1617 Mail Service Center,
Raleigh, North Carolina 27699-1617.

Nowell, Jackie
From: John Grey [e-mail]]
Sent: Friday, March 26, 2010 12:38 PM
To: Nowell, Jackie
Subject: Dutchmans Creek WWTP operations rating NCO021491
Dear Jackie, Mike and Steve:
I understand from conversations with each of you on behalf of the Town of Mocksville that the Dutchmans Creek WWTP
was incorrectly rated as a Grade II operation previously but must be rated a Grade III plant in accordance with current
rules requiring all plants with permitted flows between 0.5 and 2.4 mgd to be Grade III facilities.
I further understand that the new permit is scheduled to become effective in May. However, in order for the Town to
renegotiate its operations contract with Davie County, and to allow for budgeting into the new fiscal year, we request that
the Town be allowed additional time for Grade III compliance.
We therefore request a Grade III compliance extension until approximately September of this year.
Thanks for anything you can do.
John Grey, PE
Grey Engineering, Inc.
Phone: [phone]
Fax: [phone]

Nowell, Jackie
From: Mickey, Mike
Sent: Thursday, March 25, 2010 10:40 AM
To: Nowell, Jackie
Subject: RE: Dutchman/Mocksville
We didn't discuss a timeframe. It guess it would depend on the date of permit reissuance and when their contract
expires (fiscal or calendar year?). I'm thinking somewhere between 3 months and a year. Much more would be pushing
it. Mike.
Mike Mickey
[e-mail]
NC Division of Water Quality
585 Waughtown Street
Winston-Salem, NC 27107
Phone: [phone]
FAX: [phone]
E-mail correspondence to and from this address may be subject to the North
Carolina Public Records Law and may be disclosed to third parties.
From: Nowell, Jackie
Sent: Thursday, March 25, 2010 10:36 AM
To: Mickey, Mike
Subject: RE: Dutchman/Mocksville
Hey Mike, did he say how much time, the town would need to renegotiate?
From: Mickey, Mike
Sent: Thursday, March 25, 2010 9:19 AM
To: Nowell, Jackie
Cc: Reid, Steve
Subject: Dutchman/Mocksville
Jackie - Just a heads up. Got a call from the town's engineer this morning (John Grey) concerning the increased
monitoring frequency for the draft permit. He wanted to know if DWQ could put a time delay in the permit for upping
the monitoring from weekly to 3/week to give Mocksville time to renegotiate the contract with Davie County (Davie
County operates the Dutchman WWTP for Mocksville). I told him to touch base with you to see if that was possible.
WSRO doesn't have an issues with granting a delay. Mike.
Mike Mickey
Mike. Mickev(MNCDEN R.gov
NC Division of Water Quality
585 Waughtown Street
Winston-Salem, NC 27107
Phone: [phone]
1

FAX: [phone]
E-mail correspondence to and from this address may be subject to the North
Carolina Public Records Law and may be disclosed to third parties.
2

. •' She. �S rio.,J �.p�c�e�
��1� NCDENR
Be rly Eaves Perdue
Gove or
North Carolina Department of Environment and Natural R
Ms. Christine Gas, Town Manager
Town of Mocksville
171 Clement Street
Mocksville, North Carolina 27028
%F. \\e�
Dear Ms. Szmeler,s.
Division of Water Quality
Colleen H. Sullins
Director
February 17, 2010
FEB 2 6 2010
Subject: Draft NPDES Permit
Permit No. NCO021491
Dutchman Creek WWTP
Davie County
Secretary
The Division of Water Quality (DWQ) has received your application and has drafted a NPDES permit
for the above referenced facility. The draft permit authorizes the Town of Mocksville to discharge wastewater
from the Dutchman Creek Wastewater Treatment Plant to Dutchman Creek, a class C water in the Yadkin -
Pee Dee River Basin. The draft permit includes discharge limitations/or monitoring for flow, BOD5, ammonia
nitrogen, total suspended solids, dissolved oxygen, total residual chlorine, fecal coliform, cadmium, cyanide,
silver, copper, zinc, and chronic toxicity.
The following procedure has been implemented by DWQ: Total residual chlorine (TRC) compliance level
changed to 50 ug/l. Effective March 1, 2008, the Division received EPA approval to allow a 50 ug/l TRC
compliance level. This change is due to analytical difficulties with TRC measurements. Facilities will still be
required to report actual results on their monthly discharge monitoring report (DMR) submittals, but for
compliance purposes, all TRC values below 50 ug/l will be treated as zero. A footnote regarding this change
has been added to the effluent limitations page in the draft permit.
The following modifications have been made to the draft permit:
The deletion of the effluent page for 0.68 MGD based on the completion of the plant expansion to 0.98
MGD. The wasteflow for the plant will be 0.98 MGD instead of 0.981 MGD, based on information in
the permit application.
A monthly average and a daily maximum limit for cadmium will be added to the permit based on the
results of the reasonable potential analysis that indicated the potential to exceed the water quality
standard instream. The monthly average limit will be 7 ug/l and the daily maximum limit will be 15
ug/l.
• Additional treatment components have been added on the supplement to permit cover sheet. Please
review the permit cover sheet to confirm these additions.
1617 Mail Service Center, Raleigh, North Carolina 27699-1617
Location: 512 N. Salisbury St Raleigh, North Carolina 27604 One
Phone: [phone] \ FAX: [phone] \ Customer Service: 1-877-M-6748 North Carolina
Internet www.ncwaterquality.org �ln%��rif//1/
An Equal Opportunity\ Affirmative Action Employer Na `iall

r
• There have been minor language changes and the addition of a new paragraph regarding data
submittal in special condition A. (2) Chronic Toxicity Permit Limits. (The new paragraph is located
second from the end of the condition.)
• An annual effluent pollutant scan has been added to fulfill EPA's application requirement for major
municipal wastewater treatment facilities.
• Monthly monitoring for total chromium, total nickel, and total lead has been deleted from the permit
based on the results of a reasonable potential analysis conducted on submitted monitoring data. The
results indicated that there was no reasonable potential to exceed water quality standards in the
receiving stream.
• The effluent limit for total cyanide has been removed from the permit based on the results of a
reasonable potential analysis conducted on submitted monitoring data. The results indicated that
there was no reasonable potential to exceed water quality standards instream. It is recommended that
total cyanide be monitored quarterly in conjunction with the whole effluent toxicity test.
At this time, the Division is submitting a notice to the newspapers of general circulation in Davie
County, inviting comments from you or your representative, the public and other agencies on the draft
permit. The notice should be published on or about February 24, 2010. Following a 30-day comment
period, we will review all pertinent comments received and take appropriate action on the permit issuance.
Please provide written comments on the draft permit no later than March 26, 2010. If you have any
questions or need additional information, please contact me at telephone number [phone] or
[e-mail].
Respectfully,
Original signed by
Jacquelyn M. Nowell
Western NPDES Program
Attachments
cc: Winston Salem Regional Office/Surface Water Protection Section (ecopy)
EPA Region IV/Attn. Marshall Hyatt
Aquatic Toxicology Unit/ Cindy Moore (ecopy)
Technical Assistance and Certification Unit (ecopy)
ESS/ Carrie Ruhlman (ecopy)
NPDES File/ NCO021491

DENR/DWQ
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
NPDES No. NCO021491 !� No S
Facility Information %
Applicant/Facility Name:
Town of Mocksville - Dutchmanj Creek WWTP
Applicant Address:
171 Clement St.
Mocksville, N.C. 27028
Facility Address:
295 Garwood Road Mocksville, N.C.
Permitted Flow
0.98 MGD
Type of Waste:
Domestic and industrial
Facility/Permit Status:
Renewal
Facility Classification
III
County:
Davie
Miscellaneous
Receiving Stream:
Dutchman Creek
Regional Office:
Winston-Salem
Stream Classification:
C
USGS To o Quad:
D16NE
303 d Listed?:
No
Permit Writer:
Jackie Nowell
Subbasin:
03-07-05
Date:
February 16, 2010
Drainage Area mil :
108
Summer 7Q10 cfs
2.54
Winter 7Q10 (cfs):
11.95
Average Flow cfs :
1 106
IWC %:
37.5
Primary SIC Code:
14952
SUMMARY OF FACILITY INFORMATION AND WASTELOAD ALLOCATION
The Town of Mocksville has requested a permit renewal for the Dutchman/s Creek WWTP.
Previous permit was issued Julyl5, 2005, expired on June 30, 2009 and has been
administratively extended. During the last permit cycle, the existing 0.68 MGD WWTP (which
consisted of two parallel 0.34 MGD systems) has been expanded to the proposed flow of 0.98
MGD according to renewal application. The facility discharges into Dutchman Creek, a class C
water, in Yadkin subbasin (030705). The plant serves a population of approximately 2200
people.
The expanded Dutchman% Creek treatment plant consists of:
o Influent pump station w�i�. ew¢c�t Ai ��C.� j�Ne S(Y@QP)
o Flow splitter box *v ttve`a1JS Ri �� (�"tiz-5
o Three aeration basins
o Thrpp secondary clarifiers
o Tworination contact units with aeration
o TwAechlorination contact units
o Aerobic digester and sludge drying beds
Mocksville currently has a modified pretreatment program with one SIU. It is recommended
that the modified pretreatment program for the Dutchman Creek WWTP be continued in this
upcoming permitting cycle.
At the last permit modification/ renewal in 2005, limits were developed for the expansion to
0.981 MGD. A Level B model predicted that the expanded wasteflow would require tertiary
limits (BOD5-= 5 mg/l , N113=2 mg/l, DO = 6 mg/1) for the protection of the dissolved oxygen
standard in Dutchman Creek. This renewal application indicates the design flow at 0.98 MGD.
The new permit will reflect the reduction of 1000 GPD of flow.
Existin¢ Effluent Limits (a,, 0.98 MGD
Qw = 0.98 MGD
Summer BODS = 5 mg/1
Winter BOD5 = 10 mg/1
Summer NH3 = 2 mg/1
Winter NH3 = 4 mg/1
Summer DO = 6 mg/I
Mocksville-Dutchman Creek WWTP Fact Sheet
NPDES Renewal
Page 1

Winter DO=5 mg/ 1
TSS = 30 mg/1
Fecal Coliform = 200/ 100ml
TRC = 28 ug/1
pH = 6-9 SU
Cyanide = 22 ug/1 (daily max.)
Monthly monitoring for cadmium, chromium, nickel, lead, silver copper and zinc.
Weekly monitoring for TP and TN
Chronic Toxicity P/ F @ 37%; January, April, July and October.
Instream monitoring for temperature and dissolved oxygen is waived because Mocksville is
member of the Yadkin Pee Dee River Basin Association.
It is recommended that the existing limits for BOD5, NH3, DO, TSS, fecal, and pH, in addition
to the chronic toxicity test of 37%, be renewed at the expanded wasteflow of 0.98 MGD. Limits
or monitoring for all metals will be evaluated through a reasonable potential analysis and
results will be documented in the RPA section of the factsheet.
RECEIVING STREAM INFORMATION:
Drainage Area = 108 sq. mi.
QA = 108 cfs
s7g10 = 2.54 cfs
w7g10 = 11.95 cfs
30g2 = 17 cfs
Updated flow information from USGS was submitted in January 2005, and the previously used
7Q 10 flow was reduced based on the new calculations. Notes from the 2005 factsheet:
During the speculative limit development for this facility, it was determined that the stream flow
data previously being used was incorrect. USGS confirmed that the 7Q10 value at this location
should be 2.54 cfs, not 15 cfs as had been used in prior permits. A level B model run using this
new stream flow information showed that a 0.981 MGD discharge is allowed in this receiving
stream, under very stringent limits, however it is unlikely that the assimilative capacity could
accommodate any additional future flows from this facility.
The facility was informed that there would be a significant change in permit limits at the
proposedflow low and they decided to move forward with the expansion request. According to the
EAA and discussions with the regional office, much of the flow justification for this expansion is
based on the need to relieve high flows at the town's Bear Creekfacility. It was indicated that
the town might apply for an expansion at that facility as well. (June 2005- T. Fields)
Dutchman Creek was not listed on North Carolina's draft 2008 impaired streams list or the
final 2006 303(d) list of impaired streams. The 2008 Yadkin Basin Plan indicates that
Dutchman Creek is impacted by habitat degradation with sources of impervious surface,
agriculture, and natural conditions. The creek is also impacted by turbidity with sources as
impervious surface and agriculture/pasture.
TOXICITY TESTING:
Current Requirement: Chronic Toxicity P/ F @ 37.5% at 0.981 MGD; January April July
October
The Mocksville-Dutchman Creek WWTP overall has a good toxicity testing record. All toxicity
tests have been passed since January 2005.
Recommendation: Renewal of existing chronic toxicity test @ 37% at 0.98 MGD in
January April July October
Mocksville-Dutchman Creek WWTP Fact Sheet
NPDES Renewal
Page 2

COMPLIANCE SUMMARY:
The Mocksville-Dutchman Creek WWTP has had compliance problems in the recent year.
There were enforcement cases in 2008, 2007 and 2005. Problems with meeting the BOD5
weekly average limit (2008), fecal coliform weekly average limit (2007) and cyanide in 2005 and
2006. A review of recent data indicates that there appears to have been some improvement in
compliance with limits and a reduction in the frequency of violations.
INSTREAM MONITORING:
NO INSTREAM MONITORING REQUIRED BECAUSE OF MOCKSVILLE MEMBERSHIP IN THE YADKIN PEE
DEE RIVER BASIN ASSOCIATION. STREAM MONITORING IS DONE THROUGH THAT COALITION.
REASONABLE POTENTIAL ANALYSIS:
Analysis was conducted using discharge monitoring reports from January 2007 through
November 2009, in addition to 2008 Priority Pollutant Analysis (PPA) data. The parameters
that were analyzed were cadmium, chromium, copper, cyanide, lead, mercury, nickel, silver,
zinc, chloroform and phenols See attached RPA results.
• The analysis of the following parameters sampled in the PPA did not show reasonable
potential to exceed the chronic allowable concentrations. The maximum predicted
concentrations were less than the chronic allowables and therefore no limit or monitoring
will be required: Mercury, Chloroform and total phenolic compounds.
• The analysis of the following permitted parameters did show reasonable potential to exceed
the NC action level standard. Per current NCDWQ procedure, no limit will be recommended
since there are no chronic toxicity testing failures or problems. It is recommended that
monthly monitoring be continued in the permit for these parameters: Copper, silver
and zinc.
• The analysis of the following parameters did not show reasonable potential to exceed either
the acute or the chronic allowable concentrations. The maximum predicted concentrations
were less than the allowables and therefore no limit or monthly monitoring will be
-required: Nickel, chromium, lead,
• Cyanide no longer showed reasonable potential to exceed the allowable chronic or acute
concentrations and therefore the existing daily maximum limit of 22 ug/1 will be deleted.
Recommend that cyanide be monitored quarterly in the permit, because the parameter
is still being detected in the effluent.
• Cadmium showed reasonable potential to exceed the chronic allowable concentration but
not the acute allowable. The maximum predicted concentration indicated the potential to
exceed the water quality standard instream. It is recommended that a monthly average
limit of 7 ug/l and a daily maximum limit of 15 ug/1 for cadmium be added to the
permit.
PROPOSED CHANGES:
The following modifications have been made to the permit:
• Cadmium limits of 7 ug/ 1 (monthly average) and 15 ug/ 1 (daily maximum) will be added
to the permit based on results of the reasonable potential analysis which indicated the
potential to exceed the water quality standard instream.
• The cyanide limit of 22 ug/ 1 will be deleted based on showing no reasonable potential to
exceed the water quality standard. However, quarterly monitoring for cyanide will
remain in the permit because the parameter is still being detected.
• Monthly monitoring for nickel, chromium, and lead will be dropped from the permit
based on the data analysis showing no reasonable potential to exceed the water quality
standard.
• Deletion of effluent page for 0.68 MGD.
• Modification of wasteflow to 0.98 MGD instead of 0.981 MGD based on information on
in the renewal application.
• The requirement for an annual effluent scan will be added to the permit based on its
new status as a major discharger based on the design flow of nearly 1 MGD.
ALL OTHER EXISTING PERMIT LIMITS AND MONITORING REQUIREMENTS WILL REMAIN
THE SAME.
Mocksville-Dutchman Creek WWTP Fact Sheet
NPDES Renewal
Page 3

PROPOSED SCHEDULE FOR PERMIT ISSUANCE:
Draft Permit to Public Notice: 02/ 17/2010
Permit Scheduled to Issue (Tentative): 5/ 1/2010
Projected Effective Date of Permit: 6/01/2010
STATE CONTACT:
If you have any questions on any of the above information or on the attached permit, please
contact Jackie Nowell at [phone].
REGIONAL OFFICE COMMENT:
1NFU66 JUPERMUR COMMENT:
Mocksville-Dutchman Creek W WTP Fact Sheet
NPDES Renewal
Page 4

Permit NCO021491
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
DRAFT PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provisions of North Carolina General Statute 143-215.1, other lawful
standards and regulations promulgated and adopted by the North Carolina Environmental
Management Commission, and the Federal Water Pollution Control Act, as amended, the
Town of Mocksville
is hereby authorized to discharge wastewater from a facility located at the
Dutchman's Creek WWTP
295 Garwood Road
Mocksville
Davie County
to receiving waters designated as Dutchman Creek in the Yadkin -Pee Dee River Basin
in accordance with effluent limitations, monitoring requirements, and other conditions
set forth in Parts I, II, III, and IV hereof.
The permit shall become effective XXXXXXXXXXXXXXXXXXX
This permit and the authorization to discharge shall expire at midnight on June 30, 2014.
DRAFT
Coleen H. Sullins, Director
Division of Water Quality
By Authority of the Environmental Management Commission

Permit NC0021491
SUPPLEMENT TO PERMIT COVER SHEET
All previous NPDES Permits issued to this facility, whether for operation or discharge are hereby revoked. As of this
permit issuance, any previously issued permit bearing this number is no longer effective. Therefore, the exclusive
authority to operate and discharge from this facility arises under the permit conditions, requirements, terms, and
provisions included herein.
The Town of Mocksville is hereby authorized to: MAO-
1. Continue to operate existing 0.98 MGD wastewater treatment system that
includes the folio g components:
� ➢ Flow splitter box
➢ �N�S\�e1.aC ew��S�AwcJ �i.�`� e�et`htiti��a� ��yQ 5c�eecJ
➢ Grit removal o,,\, «�;��� � ���eq� ScrQ2nS
➢ Flow measurement
➢ Three aeration basins
➢ Three secondary clarifiers
➢ Chlorination and dechlorination units
➢ Sludge recirculation and wasting
➢ Aerobic digester and solids storage
This facility is located at the Dutchman\Creek WWTP (295 Garwood Road,
Mocksville) in Davie County.
2. Discharge from said treatment works at the location specified on the attached map
into Dutchman\Creek, classified C waters in the Yadkin -Pee Dee River Basin.

V�A5
Permit NCO021491
A. (1.) EFFLUENT LIMITATIONS AND MONITORING RE IREMuntiENTS (0.95 MGD)
During the period beginning on the effective date of the permit and las ' l permit expiration, the
Permittee is authorized to discharge from outfall 001. Such discharges sh be limited and monitored by
the Permittee as suecified below:
EFFLUENT
LIMITS
MO
ITORING REQUIREMENTS
CHARACTERISTICS
Monthly
Weekly
Daily
easurem nt
Sample
Sample
Average
Average
Maximum
Frequenc
Type
Location'
Plow
0.98 MGD
Continuou
I or E
BOD5 20 °CZ
5.0 mg/1
7.5 mg/1
We y 1�
hR,ecordin
Composite
I, E
(April 1- October 30
BOD5 20 °CZ
10.0 mg/L
15.0 mg/L
We W
LComposite
I, E
November 1 - March 31
Total Suspended Solids
30.0 mg/1
45.0 mg/I
w9elay
Composite
I, E
Temperature ✓
lDaily I
Grab
Dissolved Oxygen 3 ✓
Woekry
Grab
E, U, D
Fecal Coliform /
200 / 100 ml
400 / 100 ml
W3
�C Grab
E
(geometric mean
NH3 as N
2.0 mg/l
6.0 mg/1
Weekly 3
Composite
E
(April 1- October 30
NH3 as N (winter)
4.0 mg/L
12.0 mg/L
We y
Composite
E
November 1 - March 31
Total Nitrogen
Weeklk
Composite
E
(NO2 + NO3 + TKN)
Total Phosphorus
Composite
E
Total Residual Chlorine°✓
28µg/I
/Week
` Grab
E
5
Chronic Toxicity
Quarterly
Composite
E
Cadmium
7 u /1
15 u /I
Monthly
Composite
E
Copper
FMonthly
Composite
E
Zin
I'Monthly
Composite
E
C snide
Quarterly
Grab
E
Silver
Monthly
Composite
E
Effluent Pollutant Scan
nnuall�IC"
E
g V
6.0 - 9.0 standard units
Wgakjqj3tA
Grab
E
Notes:
1. I= Influent. E= Effluent. U= Upstream approximately 100 feet upstream from the outfall. D= Downstrea
approximately 0.5 miles downstream from the outfall. Upstream and downstream samples shall be grab
samples collected 3/week during June, July, August, and September and once per week during the rest of
the year. As a participant in the Yadkin Pee -Dee River Basin Association, the subject facility is not
responsible for conducting the instream monitoring requirements as stated above. Should your
membership in the agreement be terminated, you shall notify the Division immediately and the instream
monitoring requirements specified in your permit will be automatically reinstated.
2. The monthly average effluent BOD5 and Total Suspended Solids concentrations shall not exceed 15 percent
of the respective influent value (85% removal).
3. The daily average dissolved oxygen effluent concentration shall not be less than 6.0 mg/I from April 1 to
October 31, and no less than 5.0 mg/L from November 1 to March 31.
4. The Division shall consider all effluent total residual chlorine values reported below 50 µg/I to be in
compliance with the permit. However, the Permittee shall continue to record and submit all values reported
by a North Carolina certified laboratory (including field certified), even if these values fall below 50 µg/l.
5. Chronic Toxicity (Ceriodaphnia) at 37%: January, April, July, and October (see condition A. (1)).6. See Condition A. (3).
There shall be no discharge of floating solids or visible foam in other than trace amounts. \
SAF�.¢� qrf, 'k�oacr. CA
4to��a;tte , Q�a�
C

Permit NCO021491
A. (2.) QUARTERLY CHRONIC TOXICITY PERMIT LIMIT (0.98 MGD)
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to
Ceriodaphnia dubia at an effluent concentration of 379/6.
The permit holder shall perform at a minimum, quarterly monitoring using test procedures outlined in the
"North Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure," Revised February 1998, or subsequent
versions or "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised -February 1998)
or subsequent versions. The tests will be performed during the months of January, April, July, and October.
Effluent sampling for this testing shall be performed at the NPDES permitted final effluent discharge below all
treatment processes.
If the test procedure performed as the first test of any single quarter results in a failure or ChV below the
permit limit, then multiple -concentration testing shall be performed at a minimum, in each of the two
following months as described in "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure"
(Revised -February 1998) or subsequent versions.
The chronic value for multiple concentration tests will be determined using the geometric mean of the highest
concentration having no detectable impairment of reproduction or survival and the lowest concentration that
does have a detectable impairment of reproduction or survival. The definition of "detectable impairment,"
collection methods, exposure regimes, and further statistical methods are specified in the "North Carolina
Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised -February 1998) or subsequent versions.
All toxicity testing results required as part of this permit condition will be entered on the Effluent Discharge
Monitoring Form (MR-1) for the months in which tests were performed. If reporting pass/fail results using the
parameter code TGP3B, DWQ Form AT-1 (original) is sent to the below address. If reporting Chronic Value
results using the parameter code THP3B, DWQ Form AT-3 (original) is to be sent to the following address:
Attention: NC DENR/ DWQ/ Environmental Sciences Section
1621 Mail Service Center
Raleigh, North Carolina 27699-1621
Completed Aquatic Toxicity Test Forms shall be filed with the Environmental Sciences Section no later than 30
days after the end of the reporting period for which the report is made.
Test data shall be complete, accurate, include all supporting chemical/physical measurements and all
concentration/response data, and be certified by laboratory supervisor and ORC or approved designate
signature. Total residual chlorine of the effluent toxicity sample must be measured and reported if chlorine is
employed for disinfection of the waste stream.
Should there be no discharge of flow from the facility during a month in which toxicity monitoring is required,
the permittee will complete the information located at the top of the aquatic toxicity (AT) test form indicating
the facility name, permit number, pipe number, county, and the month/year of the report with the notation of
"No Flow" in the comment area of the form. The report shall be submitted to the Environmental Sciences
Section at the address cited above.
Should the permittee fail to monitor during a month in which toxicity monitoring is required, monitoring will
be required during the following month.
Should any test data from this monitoring requirement or tests performed by the North Carolina Division of
Water Quality indicate potential impacts to the receiving stream, this permit may be re -opened and modified
to include alternate monitoring requirements or limits.
If the Permittee monitors any pollutant more frequently than required by this permit, the results of such
monitoring shall be included in the calculation & reporting of the data submitted on the DMR & all AT Forms
submitted.
NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control
organism survival, minimum control organism reproduction, and appropriate environmental controls, shall
constitute an invalid test and will require immediate follow-up testing to be completed no later than the last
day of the month following the month of the initial monitoring.

Permit NC0021491
A. (3) EFFLUENT POLLUTANT SCAN
The Permittee shall perform an annual Effluent Pollutant Scan for all parameters listed in the attached table
(using a sufficiently sensitive detection level in accordance with 40 CFR Part 136). Samples shall represent
seasonal variations. Unless otherwise indicated, metals shall be analyzed as "total recoverable."
Ammonia (as N)
'Trans-1,2-dichloroethylene
Bis (2-chloroethyl) ether
Chlorine (total residual, TRC)
1,1-dichloroethylene
Bis (2-chloroisopropyl) ether
Dissolved oxygen
1,2-dichloropropane
Bis (2-ethylhexyl) phthalate
Nitrate/Nitrite
1,3-dichloropropylene
4-bromophenyl phenyl ether
Kjeldahl nitrogen
Ethylbenzene
Butyl benzyl phthalate
(N and grease
Methyl bromide
2-chloronaphthalene
Phosphorus
Methyl chloride
4-chlorophenyl phenyl ether
Total dissolved solids
Methylene chloride
Chrysene
Hardness
1,1,2,2-tetrachloroed=e
Di-n-butyl phthalate
Antimony
.retrachloroethylene
Di-n-octyl phthalate
Arsenic
Toluene
Dibenzo(a,h)anthracene
Beryllium
1,1,1-trichloroethane
1,2-dichlorobenzene
Cadmium
1,1,2-trichloroethane
1,3-dichlorobenzene
Chromium
Trichloroethylene
1,4-dichlorobenzene
Copper
Vinyl chloride
3,3-dichlorobenzidinc
Lead
Acid -extractable compounds:
Diethyl phthalate
Mercury
P-chloro-m-cresol
Dimethyl phthalate
Nickel
2-chlorophenol
2,4-dinitrotoluene
Selenium
2,4-dichlorophenol
2,6-dinitrotoluene
Silver
2,4-dimethylphenol
1,2-diphenylhydmzine
Thallium
4,6-dinitro-o-cresol
Fluoranthene
Zinc
2,4-dinitrophenol
Fluorene
Cyanide
2-nitrophenol
Hexachlorobenzene
Total phenolic compounds
4-nitrophenol
Hexachlorobutadiene
Valrrtik ornanic m aadr.
Pentachlorophenol
Hexachlorocyclo-pentadiene
Acrolein
Phenol
Hexachloroethane
Acrylonitrile
) 4,6-trichlorophenol
Indeno(1,2,3-ed)pyrene
Benzene
Base -nand w oxy&
Isophorone
Bromoform
Acenaphthene
Naphthalene
Carbon tetrachloride
Acenaphthylene
Nitrobenzene
Chlorobenzene
Anthracene
N-nitrosodi-n-propylamine
Chlorodibromomethane
Benzidine
N-nitrosodimethylamine
Chloroethanc
Benzo(a)anthracene
N-nitrosodiphenylamine
2-chloroethyhinyl ether
Benzo(a)pyrene
Phenanthrene
Chloroform
3,4 benzofluoranthene
Pyrene
Dichlorobromomethane
Benzo(ghi)perylene
1,2,4-trichlorobcnzcnc
1,1-dichloroethane
Benzo(k)fluoranthene
1,2-dichloroethane
Bis (2-chloroethoxy) methane
Test results shall be reported to the Division in DWQ Form- A MR-PPA1 or in a form approved by
the Director within 90 days of sampling. The report shall be submitted to the following address:
Division of Water Quality, Surface Water Protection Section, Central Files,1617 Mail Service Center,
Raleigh, North Carolina 27699-1617.

Mickey, Mike
From:
Mickey, Mike
Sent:
Thursday, February 25, 2010 1:15 PM
To:
Reid, Steve
Cc:
Nowell, Jackie
Subject:
RE: Mocksville-Dutchman Cr
Attachments:
image002.gif; image003.jpg
Steve — I would go ahead and send the letter. No need to wait. Thanks, Mike.
Mike Mickey
Mi ke.Mickev[@ NCDENR.eov
NC Division of Water Quality
585 Waughtown Street
Winston-Salem, NC 27107
Phone: [phone]
FAX: [phone]
E-mail correspondence to and from this address may be subject to the North
Carolina Public Records Law and may be disclosed to third parties.
From: Reid, Steve
Sent: Thursday, February 25, 2010 12:10 PM
To: Mickey, Mike
Subject: Mocksville-Dutchman Cr
Mike -
Greetings! Beth passed on your email on the subject facility. I'm the NPDES dude for classifications
Not sure why, but this was set up long ago as a Grade 2 in BIMS. It should, based on flow, be a Grade 3, as you guessed.
I can generate a classification letter for them to go out on issuance or before, whichever you think best. According to what's in BIMS,
they have a Grade 2 ORC and Grade 3 Backup ... not sure why they chose that route...
Just let me know when you want me to send the letter out to them notifying of the Grade 3 requirements.
Or, call me to discuss...
Thanks!
sr
Extension Education & Training Specialist
NCDENR, DWQTechnical Assistance & Certification Unit
919.733.0026 x314
steve.reid@ncdencaov
219 E. North St. (physical)
Raleigh NC 27601
1618 Mail Service Center (mailing)
Raleigh, NC 27699-1618
919.733.1338 (fax)

http-//www.ncwaterguality.org/tacu
---------------------------------------------------- --------------------------------------------------------------------------------------------
E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to third parties.
-------------------------------------------------------------------------------------------------------------------------------------------------

Mickey, Mike
From: Mickey, Mike
Sent: Wednesday, February 24, 2010 3:46 PM
To: Nowell, Jackie
Subject: RE: Mocksville Dutchman -Creek WWTP
Jackie — Below are my comments. One item I still have a question about is the monitoring frequency. Dutchman is a
grade III plant. Shouldn't they have 3/week monitoring instead of weekly?
Cover letter
The town managers name is Christine W. Bralley (not Sanders). She married the county manager.
Fact Sheet
There is no "s" on the end of Dutchman (found 4 times).
For the treatment plant narrative I recommend the following change to the first two items:
• Influent pump station with mechanical fine screen
• Grit chambers with manual bar screens
(additionally, you can add "gas" before chlorination and dechlorination if you want)
Draft permit
Remove "s" from Dutchman (once first page, twice supplement sheet).
On supplement page I recommend the first three items of the treatment components be listed as follows:
• Influent pump station with mechanical fine screen
• Grit chambers with manual bar screens
• Flow splitter box
On the effluent limit and monitoring page.
• Put footnote "6" beside Effluent Pollutant Scan.
The sample type for Effluent Pollutant Scan is listed at "grab". Is that correct? Asheboro's permit
(NC0026123) says "composite", East Burlington's permit (NC0023868) says "grab/composite" and
Winston-Salem's Elledge permit (NC0037834) says "See A.(3)". I'll let you figure that out. Good luck.
I'll send you the signed fact sheet by courier with corrections marked by hand once I hear back from TACU on 3/week.
Let me know your thoughts on 3/week and holler if you have any questions. Mike.
Mike Mickey
Mike.M ickev@NCDEN R.eov
NC Division of Water Quality
585 Waughtown Street
Winston-Salem, NC 27107
Phone: [phone]
FAX: [phone]
E-mail correspondence to and from this address maybe subject to the North
Carolina Public Records Law and may be disclosed to third parties.
From: Tedder, Steve [mailto:[e-mail]]
Sent: Monday, February 22, 2010 8:58 AM

To: Mickey, Mike
Subject: FW: Mocksville Dutchman -Creek WWTP
From: Nowell, Jackie
Sent: Friday, February 19, 2010 12:31 PM
To: [e-mail]; Tedder, Steve; Reid, Steve; Moore, Cindy; Morrison, Sarah
Subject: Mocksville Dutchman -Creek WWTP
The attached permit was sent to public notice on February 17, 2010. Please review and forward any comments.
WSRO, please sign and return/fax the factsheet.
Thank you.
Jackie Nowell

Nowell, Jackie
From: Hyatt. [e-mail]
Sent: Monday, February 22, 2010 10:40 AM
To: Nowell, Jackie
Subject: Re: FW: Mocksville Dutchman -Creek WWTP
EPA has no comments on this draft permit.

Winston-Salem Journal
Advertising Affidavit
Winston-Salem Journal
P.O Box 3159
Winston-Salem, NC 27102
NCDENR/DWQ/POINT SOURCE BRANCH
ATTN: DINA SPRINKLE
1617 MAIL SERVICE CENTER
RALEIGH, NC 27699-1617
Account Number
3376309
Date
February 19, 2010
Date Category Description Ad Size Total Cost
02/19/2010 Legal Notices
PUBLIC NOTICE
North Carolina Envtroamental
Uanawrnent Cornnnssion/NPDFSBmit
1617
flail Service center
Raleigh NC 27699-1617
Notice of Intent to Issue a
NPDES Wastewater Permit
The North Carolina Environmental Manage-
ment Commission proposes to Issue a NPDES
wastewater discharge permit to the person(s)
listed below.
Written comments regarding the proposed per-
mit will be accepted until 30 days after the pub-
lish date of this notice. The Director of the NC
Divlslon of Water Quality (DWQ) may hold a
public hearing should there be a significant de-
gree of public Interest Please ma comments
and/or Information requests to DWQ at the
above address. interested persons may visit
the DWQ at 512 N. Salisbury Street. Raleigh, NC
to review information on File. Additional Infor-
mation on NPDES permits and this notice may
be found
or by calling (919) SD �pq . waterquattty
The Town of Mocksville requested renewal of
ermlt NCO021491 for Dutchman's Creek rWgWTP
treated muniGtypalThwastteewa wastewater i Dutchman
Creek in the Yadkin -Pee Dee River Basln.
WSJ: February 196 2010
PUBLIC NOTICE North Carolina Environment 2 x 36 L 260.06
Media General Operations, Inc.
Publisher of the
Winston-Salem Journal
Forsyth County
Before the undersigned, a Notary Public of Forsyth County, North Carolina, duly
commissioned, qualified, and authorized by law to administer oaths, personally appeared
S.A. Bragman, who by being duly sworn deposes and says: that she is the Assistant
Controller of the Winston-Salem Journal, engaged in the publishing of a newspaper known
as Winston-Salem Journal, published, issued and entered as second class mail in the City of
Winston-Salem, in said County and State: that she is authorized to make this affidavit and
sworn statement: that the notice or other legal advertisement, a true copy of which is
attached hereto, was published in the Winston-Salem Journal on the following dates:
02/19/2010
and that the said newspaper in which such notice, paper document, or legal advertisement
was published was, at the time of each and every such publication, a newspaper meeting all
the requirements and qualifications of Section 1-597 of the General Statutes of North
Carolina and was a qualified newspaper within the meaning of Section 1-597 of the General
Statutes of North Carolina.
This 19th day of February, 2010
Sworn to and subscribed before me, this 19th day of
My Commission expires , 01.E ZU�V
(signature
, 2010
affidavit)
KIMALEY JOHNSON
NOTARY PUBLIC
FORSYTH COUNTY
STATE OF NORTH CAROM
THIS IS NOT A BILL. PLEASE PAY F

REASONABLE POTENTIAL ANALYSIS
Mocksville WWTP
N CO021491
Time Period 2007-2009
Ow (MGD)
0.68
7010S (cis)
2.54
7010W (cfs)
11.95
3OQ2 (cfs)
17.11
Avg. Stream Flow, QA (cfs)
106
Rec'ving Stream Dutchmans Creek
WWTP Class III
IWC (%) @ 7Q10S 29.327
@ 701OW 8.1052
@ 30Q2 5.8027
@ QA 0.9845
Stream Class C
Outfall 001
Qw=0.68MGD
STANDARDS &
PARAMETER
TYPE
CRITERIA 2
PQL
Units
REASONABLE POTENTIAL RESULTS
RECOMMENDED ACTION
h1
NC WQS1 % FAY/
Chronic Acute
n # Dot Max Pred Cw A//owable Cw
Acute: NIA
Chloroform
C
170.0
ug/L
4 2 24.8
f
Note: n<12 ;
_ _ ----_-
I Chronic: 17,267
_ _ --_ _ -- ---
No RP to exceed chronic allowable. No monitoring
Limited data set
recommended.
Acute: 15
RP shown to exceed chronic allowable only. Recommend
Cadmium
NC
2 15
ug/L
35 15
10.4
_ _ _ — _
mo. Avg and da. Max limit in permit.
Chronic: 7
Acute: 1,022
No RP to exceed chronic or acute allowable. No monitorinc
Chromium
NC
50 1,022
ug/L
27 14
19.8
or limit recommended.
_ _ _ _ _ _
Chronic 170 -
I
— - — - — - — - — - — - — - — - — - — - — - — - — - — -
Acute: 7
RP shown to exceed chronic and acute allowable. Since C,
Copper
NC
7 AL 7.3
ug/L
36 30
213.5
_
_ _ _
is NC action level std and no WET _tox_problemit _s, no lm
Chronic_ 24
co
remmended in permit. Howeve_r, recommend monthly
monitoring.
Acute: 22
No RP to exceed chronic or acute allowable. No {unit
Cyanide
NC
5 N 22
10
ug/L
57 29
15.6
I _ _ - — _ _
recommended_ Add quarterty monitoring to the perrniL -
_
Chronic 17
Acute: 34
No RP to exceed chronic or acute allowable. No monitorinc
Lead
NC
25 N 33.8
ug/L
35 14
15.5
or limit recommended.
_ _
i Chronic---85 -
-----------------------------
Acute: NIA
Mercury
NC
12
2.0000
ng/L
3 2 I 1.0000
Note: n<12
_ _ ___ __
Chronic 41
_ _ _ _ _ _ _ _ __N_ _ _---
No RP to exceed chronic allowable. o monitoring
Limited data set
recommended.
Acute: 261
No RP to exceed chronic or acute allowable. No mondorinc
Nickel
NC
88 261
ug/L
36 15
33.4
-
or limit recommended.
_
Chronic 300
-----------------------------
Acute: NIA
Phenols
A
300 N
ug/L
4 3 784.0
Note: n<12
_ _ _ _ _ _ _
! Chronic 5,170
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
No RP to exceed chronic allowable. No monitoring
Limited data set I
recommended.
Acute: 1
RP shown to exceed chronic and acute allowable. Since AI
Silver
NC
0.06 AL 1.23
ug/L
34 14
19.0 1
_ _ _ _ _ _
___ is NC action level std and no WET toxproblems, no Imit
_
Chronic 0
recommended in permit However, recommend monthly
monitoring.
Acute: 67
RP shown to exceed chronic and acute allowable. Since Zi
Zinc
NC
50 AL 67
ug/L
39 39
620.4
is NC action level std and no WET _tox_problems, no Imft
Chronic_ 170
recommended in permit However, recommend monthly
monitoring.
'Legend.
C = Carcinogenic
NC = Non -carcinogenic
A = Aesthetic
Freshwater Discharge
21491 rpa2010datamod.xls, rpa
2/19/2010

REASONABLE POTENTIAL ANALYSIS
Cadmium
Chromium
Date
Data
BDL=112DL
Results
Date
Data
BDL=112DL
Results
1
Jan-2007
'�;
2
1.0
Std Dev.
1.2763
1
Jan-2007
<
5.
2.5
Std Dev.
2.5668
2
Feb-2007
3
3.0
Mean
1.8429
2
<
5.
2.5
Mean
4.6296
3
2
1.0
C.V.
0.6926
3
<
5.
2.5
C.V.
0.5544
4
2
1.0
n
35
4
<
5.
2.5
n
27
5
2
1.0
5
<
5.
2.5
6
2
1.0
Mult Factor =
2.0700
6
<
5.
2.5
Mull Factor =
1.9800
7
2
1.0
Max. Value
5.0 ug/L
7
<
5.
2.5
Max. Value
10.0 ug/L
8
2
1.0
Max. Pred Cw
10.4 ug/L
8
<
5.
2.5
Max. Pred Cw
19.8 ug/L
9
2
1.00
9
<
5.
2.5
10
2
1.00
10
<
5.
2.5
11
2
1.00
11
<
5.
2.5
12
Dec-2007
2
1.00
12
<
5.
2.5
13
Jan-2008
2.
1.00
13
<
10.
5.0
14
2.
1.00
14
10.
10.0
15
2.
1.00
15
Oct-2008
5.
5.0
16
2.
1.00
16
17
2.
1.00
17
18
2.
1.00
18
19
2.
1.00
19
5.
5.0
20
n_<.
2.
1.00
20
21.c
5.
2.50
21
22
Oct-2008
5.
5.00
22
23
2.
2.00
23
24
Dec-2008
2
2.00
24
5.
5.0
25
25
26
Jan-2009
2.
2.00
26
5.
5.0
27
27
5.
5.0
28
2.
2.00
28
5.
5.0
29
2.
2.00
29
30
2.
2.00
30
5.
5.0
31
31
5.
5.0
32
2.
2.00
32
5.
5.0
33
2.
2.00
33
34
-
2.
2.00
34
5.
5.0
35
35
10.
10.0
36
2.
2.60
36
10.
10.0
37
S.
5.00
37
Nov-2009
10.
10.0
38
5.
5.00
38
39
Nov-2009
-
5.
5.00
39
40
40
41
41
42
42
43
43
44
44
45
45
46
46
47
47
48
48
49
49
50
50
51
51
52
52
53
53
54
54
55
55
56
56
57
57
58
58
59
59
60
60
199
199
200`;I
200

REASONABLE POTENTIAL ANALYSIS
Chloroform
Date
Data BDL=112DL
Results
1
Dec-2008
6.01 6.0
Std Dev.
1.7889
2
Oct-2008
< 5 2.5
Mean
3.3300
3
Nov-2008
2.31 2.3
C.V.
0.5372
4
Sap-2008
< 5 2.5
n
4
5
6
Mult Factor =
4.1200
7
Max. Value
6.0 ug/L
8
Max. Fred Cw
24.8 ug/L
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
199
200

REASONABLE POTENTIAL ANALYSIS
Copper I Cyanide
Date
Data
BDL=112DL
Results
Date
Data
BDL=112DL
Results
1
Jan-2007
;4
2
1.0
Std Dev.
12.0475
1
Nov-2009
5
5.0
Std Dev.
2
2
1.0
Mean
9.6667
2
5
5.0
Mean
3
'<;
2
1.0
C.V.
1.2463
3
r-=
5
5.0
C.V.
4
Ma Y -2008
f.
�:,
2
1.0
n
3fi
4
� �,,;,
5
5.0
n
5
Jun-2008'<'
2
1.0
5
5
5.0
6
Jul-2008
r:..:
y
2
1.0
Mult Factor =
3.0500
6
; '
5
5.0
Mult Factor =
7
-2007 Ap r
I� �
7.
7.0
Max. Value
70.0 u9 /L
7
i
5
5.0
Max. Value
8
1
E
4.
4.0
Max. Pred Cw
213.5 u /L
9
8
3
;
5
5.0
Max. Prod Cw
9
;
5.
5.0
9
5
5.000
10
{;`<
10
'"
5
5.000
11
i `:
3.
3.0
11
° "'
5
5.000
12
7.
7.0
12
5
5.000
13
70.
70.0
13
5
5.000
14
}C6..: t
�;' j
12.
12.0
14
i° a
I:;; ;
5
5.0
15
; -
10.
10.0
15
.:" ;
5
5.0
16
=!
13.
13.0
16
5
5.0
17
"';;:,
15.
15.0
17
5
5.0
18
j
6.
6.0
18
}
5
5.0
19
12.
12.0
19
:_
5
5.0
20
` 4
13.
13.0
20
T
5
5.0
21
f;j
11.
11.0
21
F _
5
5.0
22
x.; E
r:
22
:' _<<,
5
5.0
23
: =;°I
23
Dec-2008
? : _ =
5
5.0
24
{
24
,a
5
5.0
25
s
6.
6.0
25
5
5.0
26
'' a
26
"
5
5.0
27
27
5
5.0
28
L .,
28
! r, 3
5
5.0
29
29<
5
5.0
30;`
I
2.
2.0
30
F
5
5.0
31
:S
31
R.: a
5
5.0
32
0"1
2.
2.0
32
� C;
5
5.0
33
° !
2.
2.0
33
c
5
5.0
34
4.
4.0
34
<
5
5.0
35
35
r<:
5
5.0
36
5.
5.0
36
W`c
5
5.0
37
'= '
17.
17.0
37<t
5 •
5.0
38
r j
19.
19.0
38
` -' 13r
13.0
39
`'.,,;
39
icy
5
5.0
40
r,�
25.
25.0
40
+
5
5.0
41
•x--.
;;• �
12.
12.0
41
5
5.0
42
10.
10.0
42
<.4
5
5.0
43
Nov-2009
-';;
10.
10.0
43
5
5.0
44
Dec-2008
;:`
3
3.0
44
c;
5
5.0
45
Oct-2008
=
18
18.0
45:s'
5
5.0
46
Sep-2008
:�
I""
15
15.0
46
}?t
`
5
5.0
47
Nov-2008
f
4
4.0
47
Dec-2007
<
f:.,,�
5
5.0
48''.n,
48
5
5.0
49:-
%
49
:rr
5
5.0
52
52
i.4;
5
5.0
53
:.
53
i4l<
5
5.0
54
y:::,
54<S
5
5.0
55I
kx.,�
55
5
5.0
56
r '.f
56
{ <
5
5.0
57
a' :j
57
<a
5
6.0
58
J :
Ms.
58
, }
59
199
#- !
199
r,..
200:=1
200
`
1.0596
5.1404
0.2061
57
1.2000
13.0
15.6

REASONABLE POTENTIAL ANALYSIS
Lead
Mercury
Date
Data
BDL=1/2DL
Results
Date
Data BDL=1l2DL
Results
1
Jan-2007
10
5.0
Std Dev.
2.4533
1
Dec-2008
1.48 1.0
Std Dev.
0.0000
2
10
5.0
Mean
6.2857
2
Oct-2008
< 1 1.0
Mean
1.0000
3
10
5.0
C.V.
0.3903
3
Sep4008
`-- 1.05 1.0
C.V.
0.0000
4
10
5.0
n
35
4
n
3
5
10
5.0
5
6
10
5.0
Mult Factor =
1.5500
6
Mull Factor =
1.00
7
<
10
5.0
Max. Value
10.0 ug/L
7
Max. Value
1.0 ng/L
8
<
10
5.0
Max. Pred Cw
15.5 ug/L
8
Max. Pred Cw
1.0 ng/L
9
<
10
5.0
9
10
<
10
5.0
10
11
<
10
5.0
11
12
<
10
5.0
12
13
<
10
5.0
13
14
<
10
5.0
14
15
<
10
5.0
15
16
<
10
5.0
16
17
<
10
5.0
17
18
<
10
5.0
18
19
<
10
5.0
19
20
<
5
2.5
20
21
<
5
2.5
21
22
5.
5.0
22
23
10.
10.0
23
24
24
25
25
26
26
27
10.
10.0
27
28
28
29
29
30
30
31
31
32
10.
10.0
32
33
33
34
10.
10.0
34
35
10.
10.0
35
36
10.
10.0
36
37
37
38
10.
10.0
38
39
10.
10.0
39
40
10.
10.0
40
41
41
42
10.
10.0
42
43
5.
5.0
43
44
5.
5.0
44
45
Nov-2009
5.
5.0
45
46
46
47
47
48
48
49
49
50
50
51
51
52
52
53
53
54
54
55
55
56
56
57
57
58
58
59
59
60
60
199
199
200
200

REASONABLE POTENTIAL ANALYSIS
Nickel
Phenols
Date Data
BDL=1/2DL
Results
Date
Data
BDL=112DL
Results
1
<
10.
5.0
Sul Dev.
3.4027
1
Sep-2008
7.8
7.8
Std Dev.
31.2515
2
<
10.
5.0
Mean
7.2361
2
Oct-2008
70
70.0
Mean
29.8250
3
<
10.
5.0
C.V.
0.4702
3
Nov-2008
39
39.0
C.V.
1.0478
4
<
10.
5.0
n
36
4
Dec-2008
< 5
2.5
n
4
5
<:
10.
5.0
5
6
10.
5.0
Mull Factor =
1.6700
6
Mult Factor =
11.2000
7
10.
5.0
Max. Value
20.0 ug/L
7
Max. Value
70.0 ug/L
8
10.
5.0
Max. Fred Cw
33.4 ug/L
8
Max. Fred Cw
784.0 ug/L
9
°NI
10.
5.0
9
10
+,C�
10.
5.0
10
11
-`/
10.
5.0
11
12
10.
5.0
12
13
10.
5.0
13
14
10.
5.0
14
15
10.
5.0
15
16
10.
5.0
16
17
10.
510
17
18
10.
5.0
18
19
10.
5.0
19
20
5
2.5
20
21
20
10.0
21
22
20.
20.0
22
23
10.
10.0
23
24
24
25
25
26
26
27
10.
10.0
27
28.
28
29
29
30
30
31
31
32
10.
10.0
32
33
33
34
10.
10.0
34
35
10.
10.0
35
36
10.
10.0
36
37
37
38
10.
10.0
38
39
10.
10.0
39
40
10.
10.0
40
41
41
42
10.
10.0
42
43
10.
10.0
43
44
10.
10.0
44
45
10.
10.0
45
46
Sep-2008
3
3.0
46
47
47
48
48
49
49
50
50
51
51
52
52
53
�:
53
54
54
55
55
56
56
57
57
58
58
59
59
60
60
199
199
200
200
21491rpa2010datannod.x1s, data
5- 2/16/2010

REASONABLE POTENTIAL ANALYSIS
Silver
Zinc
Date Data
BDL=1/2DL
Results
Date
Data
BDL=112DL
Results
1
<
5
2.5
Std Dev.
2.4402
1
36.
36.0
Std Dev.
62.9494
2
<
5
2.5
Mean
4.1912
2
105.
105.0
Mean
131.5385
3
<
5
2.5
C.V.
0.5822
3
86.
86.0
C.V.
0.4786
4
<
5
2.5
n
34
4
163.
163.0
n
39
5
<
5
2.5
5
97.
97.0
6
<
5
2.5
Mult Factor =
1.9000
6
113.
113.0
Mult Factor =
1.6500
7
<
5
2.5
Max. Value
10.0 ug/L
7
103.
103.0
Max. Value
376.0 ug/L
8
<
5
2.5
Max. Fred Cw
19.0 ug/L
8
132.
132.0
Max. Fred Cw
620.4 ug/L
9
<
5
2.5
9
107.
107.0
10
<
5
2.5
10
147.
147.0
11
<
5
2.5
11
133.
133.0
12
<
5
2.5
12
234.
234.0
13
<
5
2.5
13
187.
187.0
14
<
5
2.5
14
142.
142.0
15
<
5
2.5
15
151.
151.0
16
<
5
2.5
16
107.
107.0
17
<
5
2.5
17
111,
111.0
18
<
5
2.5
18
121.
121.0
19
<
5
2.5
19
111.
111.0
20
<
10
5.0
20
100.
100.0
21
10.
10.0
21
209.
209.0
22
5.
6.0
22
198.
198.0
23
23
134.
134.0
24
24
25
25
26
5.
5.0
26
27
27
87.
87.0
28
28
29
29
30
30
31
5.
5.0
31
32
32
105.
105.0
33
5.
5.0
33
34
5.
5.0
34
158.
158.0
35
5.
5.0
35
49.
49.0
36
36
71.
71.0
37
5.
5.0
37
38
5.
5.0
38
99.
99.0
39
5.
5.0
39
234.
234.0
40
40
107.
107.0
41
5.
5.0
41
42
10.
10.0
42
112.
112.0
43
10.
10.0
43
116.
116.0
44
10.
10.0
44
68.
68.0
45
45
52.
52.0
46
46
Dec-2008
115
115.0
47
47
Oct-2008
376
376.0
48
48
Sep-2008
233
233.0
49
49
Nov-2008
121
121.0
50
50
51
51
52
52
53
53
54
54
55
55
56
56
57
57
58
58
59
59
60
60
199
199
200
200
21491rpa2010datamod.xls, data
-6- 2/16/2010

Nowell, Jackie
From: Belnick, Tom
Sent: Monday, February 08, 2010 1:59 PM
To: Nowell, Jackie
Subject: FW: Town of Mocksville EA Scoping
Fyi... you mentioned Mocksville permit renewal.... I have some info on proposal, but not sure if it affects anything in the
current permit.
Tom Belnick
Supervisor, NPDES West Program
NC DENR/Division of Water Quality
1617 Mail Service Center, Raleigh, NC 27699-1617
[phone]; fax [phone]
E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be
disclosed to third parties.
From: Belnick, Tom
Sent: Tuesday, February 02, 2010 2:29 PM
To: Stallings, Hannah
Cc: Tedder, Steve
Subject: Town of Mocksville EA Scoping
Hannah- per your comment, I'm treating this EA Scoping as an fyi that something will be happening here, but I'm not
clear on what it is. The Town is proposing to "upgrade a wastewater pretreatment process to be located at Crestwood
Farms, ...in addition to making upgrades to the Lagle WTP as required by DENR". Looks like they have $1.7 Mill from
Community Level Block Grant. If more info is forthcoming, let me know.
Tom Belnick
Supervisor, NPDES West Program
NC DENR/Division of Water Quality
1617 Mail Service Center, Raleigh, NC 27699-1617
[phone]; fax [phone]
E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be
disclosed to third parties.

2WOo i,
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Hief WWTP
Residual Chlorine
Ammonia as NH3
(summer)
7Q10 (CFS)
2.54
7Q10 (CFS)
2.54
DESIGN FLOW (MGD)
0.98
DESIGN FLOW (MGD)
0.98
DESIGN FLOW (CFS)
1.519
DESIGN FLOW (CFS)
1.519
STREAM STD (UG/L)
17.0
STREAM STD (MG/L)
1.0
UPS BACKGROUND LEVEL (t
0
UPS BACKGROUND LEVEL
0.22
IWC (%)
37.42
IWC (%)
37.42
Allowable Concentration (ug)
45.43
Allowable Concentration (m
2.30
Ammonia as NH3
(winter)
7Q10 (CFS)
11.95
Fecal Limit
2001100ml
DESIGN FLOW (MGD)
0.98
Ratio of 1.7 :1
DESIGN FLOW (CFS)
1.519
STREAM STD (MG/L)
1.8
UPS BACKGROUND LEVEL
0.22
IWC (%)
11.28
Allowable Concentration (m
14.23
NC0025542
2/16/2010

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GREY
ENGINEERING, INC.
E N V I R; O N M E N T A L A N D C I V I L D E 5 1 G N
Mr. Charles Weaver 12/29/2008
c/o Mrs. Dina Sprinkle
N DWQ/Point Source Branch RECEIVED
1617 17 Mail Mail Service Center
Raleigh, NC 27699-1617
Re; Town Mocksville — Dutchmans Creek WWTP
NPDES Permit Renewal
Permit Number NCO021491
Dear Mr. Weaver:
Please renew the above referenced permit.
DEC 3 1 2008
DENR - WATER OUALITY
POINT SOURCE BRANCH
A process flow diagram and location map (USSGS) for the facility is attached hereto.
One signed original and two copies of EPA NPDES Form 2A (with supplemental
attachments) is included herewith.
Changes since the last renewal include plant upgrade to 0.98 mgd with addition of a
new aeration basin, mechanical fine screen, aerobic digester, additional chlorine contact
volume and dechlorination.
Solids from the treatment facility are drawn from the aerobic digester (or sludge holding
tanks) and land applied under contract with EMA Resources, Inc. in accordance with
permit number WQ0003351 dated November 17, 2008.
Please note the attached USGS correspondence indicating that the 7 day 10 year low
flow of Dutchmans Creek is 3.0 cfs.
Also note that all four minnow toxicity test results are provided. However, only two PPA
test results are attached. The additional PPA samples have been sent for analysis and
the results will be forwarded to you as soon as they are available.
Please call with questions.
Sincerely,
Grey Engineering, Inc.
John C. ey, Jr. PE
f President
Attachments
Town of Mocksville
Christine Sanders
Town Manager
P.O. Box 9 • Mocksville, NC 27028 • Phone: [phone] • Fax: [phone] • www.greyengineering.com

United States Department of the Interior
U.S. GEOLOGICAL SURVEY
3916 Sunset Ridge Road
Raleigh, North Carolina 27607
January 21, 2005
Mr. John C. Grey, Jr., Project Engineer
Grey Engineering, Inc.
P.O. Box 9, 151 Industrial Boulevard
Mocksville, North Carolina 27028
Dear Mr. Grey:
In response to your request for low -flow data, the U.S. Geological Survey (USGS) does not have site -specific,
low -flow discharge data for Dutchmans Creek near Mocksville, NC (station id 0211701350, drainage area 108
mi). The updated low -flow characteristics that are provided on the attached sheet have been computed by cor-
relating the runoff characteristics of a nearby USGS surface -water site upstream of the request site. Please note
that the flow estimates do not specifically account for the presence of any diversions or regulation, present or
future, which may occur upstream of the request site.
The upstream surface -water site used as the index site is Dutchmans Creek near Cornatzer (station id 02117000,
drainage 83.8 mi2). Available records of discharge at this site include continuous records of daily mean discharge
from March 1940 through January 1942 and partial records consisting of 10 miscellaneous measurements
obtained during the 1956, 1963, 1970-71, 1973, 1975, and 1979 water years. Assessment of low -flow character-
istics estimated for this site in October 1987 (7Q10 discharge of 15 ft3/s) were based on an analysis that used 7
of the 10 miscellaneous measurements at the index site. No previous analyses have been completed using the
continuous records of discharge at the index site.
A re-evaluation of the low -flow characteristics has been completed for the index site (Sta.02117000) using avail-
able continuous and partial records, and estimated low -flow discharges are lower than the previous estimates.
However, the updated estimates are more consistent with low -flow characteristics (in terms of yields or flow per
square mile of drainage area) at two other upstream USGS sites on Dutchmans Creek (Sta. 02116770, drainage
57.6 mil) and Cedar Creek (Sta. 02116790, drainage 19.6 mi`'). Updated low -flow analyses were also completed
at these two additional sites to help clarify the low -flow characteristics in the Dutchmans Creek basin.
Available geographic information system coverages of soil maps here in the NC District office indicate that
poorly drained soils occur across much of north and northeastern Davie County. The effect of poorly drained
soils within a basin suggests that water infiltration rates into the soils would be low (relatively to well -drained
soils), resulting in less storage of water within aquifer that would be used to sustain base flows during extended
dry periods.
This information is considered preliminary and subject to revision pending further analysis as further data were
to become available, and is made available through our cooperative program of water -resources investigations
with the North Carolina Department of Environment and Natural Resources.
If you have any questions regarding this information, please contact us at [phone].
(Oft� cc: Ms. Letoya Fields, NC Division of Water Quality
Enclosure
Sincerely,
d
J. Curtis Weaver
Hydrologist
[phone] - FAX [phone]

SUMMARY OF LOW -FLOW ESTIMATES IN RESPONSE TO REQUEST
REQUEST NO: 91624 SITE NO: 01 DATE: 01/17/2005
SOURCE: Consulting H DENR (DWQ) ACTION: Existing
STATION NUMBER: 0211701350 STATION TYPE: Ungaged (20)
STATION NAME: Dutchmans Creek near Mocksville, NC
LOCATION: 0.6 mile above Secondary Road 1605, and 3.3 miles east of Mocksville
LATITUDE: 35°53'34" LONGITUDE: 80°30'09"
QUANDRANGLE NAME AND NUMBER: Mocksville [.D-16-NEI
COUNTY CODE: Davie [059] STATE CODE: NC [37] DISTRICT CODE: NC [371
HYDROLOGIC UNIT CODE: 03040101 ENR BASIN CODE: 03-07-05
DRAINAGE AREA: 108 mil
Flow statistics as follows:
AVERAGE FLOW: Estimated using
1.0
ft3/s/mi2
108
ft3/s
see note
[ B
ANNUAL 7Q10 MINIMUM FLOW:
0.0274
ft3/s/mi2
3.0
ft3/s
see note
[ B
ANNUAL 30Q2 MINIMUM FLOW:
0.2184
ft3/s/mi2
23.6
ft3/s
see note
B
WINTER 7Q10 MINIMUM FLOW:
0.1635
ft3/s/mi2
17.7
ft3/s
see note
B
ANNUAL 7Q2 MINIMUM FLOW:
0.1671
ft3/s/mi2
18.0
ft3/s
see note
B
NOTES:
[A] Estimate is based on records collected at or near the request site.
1111 Estimate is based entirely on runoff characteristics observed at nearby streams.
[C] Estimate based on procedures given in USGS Water Supply Paper 2403 "Low -flow Characteristics
of Streams in North Carolina" (Giese and Mason, 1993).
[D] Estimate based on procedures given in USGS Water Supply Paper 2403 and in conjunction with
streamflow records collected at or near the request site.
[E] See remarks.
These data are considered provisional and subject to revision pending approval by the Director, USGS.
REMARKS:
• Low -flow estimates based on low -flow characteristics at upstream site 02117000 (Dutchmans Creek near
Comatzer), low -flow characteristics for this site re -analysed in December 2004
• Requested by Mr. John C. Grey, Grey Engineering
ENTERED BY: JCW FEE CHARGED: $ 0

Town of Mocksville — Dutchmans Creek WWTP
NDPES Permit Renewal
Process Description
This is an extended aeration treatment process with: mechanical fine screening;
flow splitting; passive grit removal at three influent parshall flumes; three aeration
basins; three circular clarifiers; chlorination; dechlorination; sludge recirculation
and wasting; aerobic digestion and solids storage with disposal to land
application.

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USGS MAP = MOCKSVILLE, N.C. USGS MAP = ADVANCE, N.C.
2000 4000 OUTFALL LOCATION
LAT.: 35' 53' 33"N
SCALE: 1"=2000' CONTOURS AT 10' LONG.: 80' 30' 07"W
WWTP-DUTC MILERAD 08
GREY ENGINEERING, INC. TOWN OF M O C K S V I LLE
Civil Design and Surveying
P.O. Box 9 Mocksville, N.C. 27028
greyengineering.com [phone] DUTCHMANS CREEK WWTP SHEET
DRAWN BY: G. BULLARD PROJ. NO.: 102.139.GE VICINITY MAP - ONE MILE RADIUS
DESIGN BY: G. BULLARD DATE: 12 18 08 OF 2

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0.968 MGD AVG. FLOW
/01w,
,NTP-DUTC NPDES 08
GREY ENGINEERING, INC.
Civil Design and Surveying
P.O. Box 9 Mocksville, N.C. 27028
greyengineering.com [phone]
DRAWN BY: G. BULLARD PROJ. NO.: 102.139.GE
DESIGN BY: G. BULLARD DATE: 12/18/08
SLUDGE SLUDGE
TO LAND TO LAND
APPLICATION APPLICATION
PLAN
SCALE: 1 " = 60'
TOWN OF MOCKSVILLE
DUTCHMANS CREEK WWTP SHEET
PROCESS SCHEMATIC of 2
2

lik
00%
Aow%
FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
DurotJrrl0,�3 C94WA'f
A!6 evo 'r-14 4
SUPPLEMENTAL APPLICATION INFORMATION
PART F.INDUSTRIAL USER DISCHARGES AND RCRA/CERCLA WASTES
All treatment works receiving discharges from significant industrial users or which receive RCRA,CERCLA, or other remedial wastes must
complete part F.
GENERAL INFORMATION:
F.I. Pretreatment program. Does the treatment works have, or is subject ot, an approved pretreatment program?
es ❑ No
F.2. Number of Significant Industrial Users (SIUs) and Categorical Industrial Users (CIUs). Provide the number of each of the following types of
industrial users that discharge to the treatment works.
a. Number of non -categorical SIUs.
b. Number of ClUs. c —
SIGNIFICANT INDUSTRIAL USER INFORMATION:
Supply the following information for each SIU. If more than one SIU discharges to the treatment works, copy questions F.3 through F.8 and
provide the Information requested for each SIU.
F.3. Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages
as necessary.
�^1 r'
Name: `IrGs.J�UJ I.ie"PeS D;W-5ltY [,yt-" % l�OSN?�105'� IALC.
Mailing Address: ZS-C1 4;;kTaN 20
acC�vtGCH -4c- 7-7oLsq
FA. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
14d=4MJ&CP' Ob44WGX1 P 10f>UGr5 .4L C.�c-+lo..le�G .�" rivlCGIIIA: a�C.`r �+4CI Lt Tt/
F.S. Principal Product(s) and Raw Material(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's
discharge.
Principal product(s): Cooxcw Gi4r[-ic7.! D/b,1eAorS
Raw material(s): G414XE.44 - 34.7-rgSK - Cli IS - 5/2ticr>t4 Co
F.B. Flow Rate.
a. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into the collection system in gallons per
day (GPD) and whether the discharge is continuous or intermittent.
(0 di Mca GPD ( continuous or "intermittent)
b. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow discharged into the collection system
in gallons per day (GPD) and whether the discharge is continuous or intermittent.
GPD ( continuous or intermittent)
F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following:
a. Local limits 2'4es ❑ No
b. Categorical pretreatment standards ❑ Yes ❑ No
If subject to categorical pretreatment standards, which category and subcategory?
NPDES FORM 2A Additional Information

W
FACILITY NAME AND PERMIT NUMBER:
ezC1c wwr� K1Cdo2l U�
PERMIT ACTION REQUESTED:
f�-cca't
RIVER BASIN:
`fsc- t-�_
Chronic: 5aL�-- Zz:ly-I ct z A 4 ` r4cir0P�
NOEC
%
%
%
IC2s
%
%
%
Control percent survival
%
ova
Other (describe)
m. Quality Control/Quality Assurance.
Is reference toxicant data available?
Was reference toxicant test within
acceptable bounds?
,
What date was reference toxicant test
run (MM/DD/YYYY)?
1
! 1
1
Other (describe)
E.3. Toxicity Reduction Evaluation. Is the treatment works involved in a Toxicity Reduction Evaluation?
❑ Yes @@ qo If yes, describe:
EA. Summary of Submitted Biomonitoring Test Information. If you have submitted biomonitoring test information, or information regarding the
cause of toxicity, within the past four and one-half years, provide the dates the information was s submitted to the permitting authority and a summary
of the results.
Date submitted: 1 / (MM/DD/YYYY)
Summary of results: (see instructions)
END OF PART E.
REFER TO THE APPLICATION OVERVIEW (PAGE 1) TO DETERMINE -WHICH OTHER PARTS
OF FORM 2A YOU MUST COMPLETE.
f4�
NPDES FORM 2A Additional Information

w
^\
FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
SUPPLEMENTAL APPLICATION INFORMATION
PART G. COMBINED SEWER SYSTEMS
If the treatment works has a combined sewer system, complete Part G.
G.I. System Map. Provide a map indicating the following: (may be included with Basic Application Information)
a. All CSO discharge points.
b. Sensitive use areas potentially affected by CSOs (e.g., beaches, drinking water supplies, shellfish beds, sensitive aquatic ecosystems, and
outstanding natural resource waters).
C. Waters that support threatened and endangered species potentially affected by CSOs.
G.2. System Diagram. Provide a diagram, either in the map provided in G.1 or on a separate drawing, of the combined sewer collection system that
includes the following information.
a. Location of major sewer trunk lines, both combined and separate sanitary.
b. Locations of paints where separate sanitary sewers feed into the combined sewer system.
C. Locations of in -line and off-line storage structures.
d. Locations of flow -regulating devices.
e. Locations of pump stations.
CSO OUTFALLS:
Complete questions G.3 through G.6 once for each CSO discharge point
G.3. Description of Outfall.
a. Oudall number
b. Location
(City or town, if applicable) (Zip Code)
(County) (Stale)
(Latitude) (Longitude)
C. Distance from shore (if applicable) ft.
d. Depth below surface (if applicable) ft.
e. Which of the following were monitored during the last year for this CSO?
❑ Rainfall ❑ CSO pollutant concentrations ❑ CSO frequency
❑ CSO flow volume ❑ Receiving water quality
I. How many storm events were monitored during the last year?
GA. CSO Events.
a. Give the number of CSO events in the last year.
events (❑ actual or ❑ approx.)
b. Give the average duration per CSO event.
hours (❑ actual or ❑ approx.)
NPDES FORM 2A Additional Information

s
FACILITY NAME AND PERMIT NUMBER:
P1Zr ,*6MA^&S GIQe'ZaL WfATW n%LGo 2:Ir14 !
PERMIT ACTION REQUESTED:
(rARAJ a�.A1QA
RIVER BASIN:
F.8. Problems at the Treatment Works Attributed to Waste Discharge by the SIU. Has the SIU caused or contributed to any problems (e.g.,
upsets, interference) at the treatment works in the past three years?
[5-'Ges ❑ No If yes, describe each episode.
50 6 o 64 E r W 6
%lo.uo
RCRA HAZARDOUS WASTE RECEIVED BY TRUCK, RAIL, OR DEDICATED PIPELINE:
F.9. RCRA Waste. Does the treatment works receive or has it in the past three years received RCRA hazardous waste by truck, rail or dedicated pipe?
❑ Yes Er a (go to F.12)
F.10. Waste transport. Method by which RCRA waste is received (check all that apply):
❑ Truck ❑ Rail ❑ Dedicated Pipe
F.11. Waste Description. Give EPA hazardous waste number and amount (volume or mass, specify units).
EPA Hazardous Waste Number Amount Units
CERCLA (SUPERFUND) WASTEWATER, RCRA REMEDIATION/CORRECTIVE ACTION
WASTEWATER, AND OTHER REMEDIAL ACTIVITY WASTEWATER:
F.12. Remediation Waste. Does the treatment works currently (or has it been notified that it will) receive waste from remedial activities?
❑ Yes (complete F.13 through F.15.) 0—No
F.13. Waste Origin. Describe the site and type of facility at which the CERCWRCRA/or other remedial waste originates (or is excepted to origniate in
the next five years).
F.14. Pollutants. List the hazardous constituents that are received (or are expected to be received). Include data on volume and concentration, if
known. (Attach additional sheets if necessary.)
F.15. Waste Treatment.
a. Is this waste treated (or will be treated) prior to entering the treatment works?
❑ Yes ❑ No
If yes, describe the treatment (provide information about the removal efficiency):
b. Is the discharge (or will the discharge be) continuous or intermittent?
❑ Continuous ❑ Intermittent If Intermittent, describe discharge schedule.
END OF PART F.
REFER TO THE APPLICATION OVERVIEW (PAGE 1) TO DETERMINE WHICH OTHER PARTS
OF FORM 2A YOU MUST COMPLETE
e1
NPDES FORM 2A Additional Information.

s 4,
f
%Ilm
FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN:
C. Give the average volume per CSO event.
million gallons (❑ actual or ❑ approx.)
d. Give the minimum rainfall that caused a CSO event in the last year
Inches of rainfall A
G.S. Description of Receiving Waters. v
a. Name of receiving water:
b. Name of watershed/river/stream system:
United State Soil Conservation Service 14-digit watershed code (if known):
C. Name of State Management/River Basin:
United States Geological Survey 8-digit hydrologic cataloging unit code (if known):
G.S. CSO Operations.
Describe any known water quality impacts on the receiving water caused by this CSO (e.g., permanent or intermittent beach closings, permanent or
intermittent shell fish bed closings, fish kills, fish advisories, other recreational loss, or violation of any applicable State water quality standard).
END OF PART G.
REFER TO THE APPLICATION OVERVIEW (PAGE 1) TO DETERMINE WHICH OTHER PARTS
OF FORM 2A YOU MUST COMPLETE.
Additional information, if provided, will appear on the following pages.
NPDES FORM 2A Additional Information

FACT SHEET FOR EXPEDITED PERMIT RENEWALS
Basic Information to determine potential for expedited permit renewal
Reviewer/Date
Permit Number
pb
Facility Name
, T
Basin Name/Sub-basin number
D 0 o
Receiving Stream
Stream Classification in Permit
�.
Does permit need NH3 limits?
0
Does permit need TRC limits?
Does permit have toxicity testing?
Does permit have Special Conditions?
Does permit have instream monitoring?
Is the stream impaired (on 303(d) list ?
f
Any obvious compliance concerns?
Any permit mods since lastpermit?
fl
Existing expiration date
o d
New expiration date
New permit effective date
Miscellaneous Comments
.1 / 1. 5/ up i - - i ^ --
Al
y L �—
YES_ This is a SIMPLE EXPEDITED permit renewal (administrative
renewal with no changes, or only minor changes such as TRC, NH3,
name/ownership changes). Include conventional WTPs in this group.
YES_ This is a MORE COMPLEX EXPEDITED permit renewal (includes
Special Conditions (such as EAA, Wastewater Management Plan), 303(d)
listed, toxicity testing, instream monitoring, compliance concerns, phased
limits). Basin Coordinator to make case -by -case decision.
YE This permit CANNOT BE EXPEDITED for one of the following reasons:
Major Facility (municipal/industrial)
• Minor Municipals with pretreatment program
• Minor Industrials subject to Fed Effluent Guidelines (lb/day limits for BOD, TSS,
etc)
• Limits based on reasonable potential analysis (metals, GW remediation organics)
• Permitted flow > 0:5 MGD (requires full Fact Sheet)
• Permits determined by Basin Coordinator to be outside expedited process
TB Version 8/18/2006 (NPDES Server/Current Versions/Expedited Fact Sheet)